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1014 results about "Multiple quantum" patented technology

High efficiency III-nitride light-emitting diodes

ActiveUS8451877B1reduce leakagelow efficiencyOptical wave guidanceLaser detailsMarket penetrationEffect light
Tailored doping of barrier layers enables balancing of the radiative recombination among the multiple-quantum-wells in III-Nitride light-emitting diodes. This tailored doping enables more symmetric carrier transport and uniform carrier distribution which help to reduce electron leakage and thus reduce the efficiency droop in high-power III-Nitride LEDs. Mitigation of the efficiency droop in III-Nitride LEDs may enable the pervasive market penetration of solid-state-lighting technologies in high-power lighting and illumination.
Owner:NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA LLC

Multiband LED chip and preparation method thereof, and white light LED light source

The invention relates to the technical field of semiconductors, and particularly discloses a multiband LED chip and a preparation method thereof, and a white light LED light source, the LED chip comprises a light-emitting layer, and the light-emitting layer comprises a first cyan light multi-quantum well layer, a second long-wave blue light multi-quantum well layer, a third short-wave blue light multi-quantum well layer and a fourth purple light multi-quantum well layer which are sequentially stacked in the epitaxial direction; the first cyan light multi-quantum well layer, the second long-wave blue light multi-quantum well layer, the third short-wave blue light multi-quantum well layer and the fourth purple light multi-quantum well layer are each of a periodic structure formed by alternately stacking well layers and barrier layers, and the light-emitting wavelengths of the first cyan light multi-quantum well layer, the second long-wave blue light multi-quantum well layer, the third short-wave blue light multi-quantum well layer and the fourth purple light multi-quantum well layer are sequentially decreased. And the forbidden band widths of the barrier layers are sequentially decreased. According to the LED chip, the overall excitation efficiency can be effectively improved, and the output full-spectrum white light LED light source is higher in color rendering index, better in stability, less in damage to human eyes and high in light emitting efficiency.
Owner:JIANGXI ZHAO CHI SEMICON CO LTD

Light-emitting diode epitaxial wafer, preparation method thereof and light-emitting diode

The invention discloses a light-emitting diode epitaxial wafer, a preparation method thereof and a light-emitting diode, and relates to the technical field of semiconductors. The light-emitting diode epitaxial wafer comprises a substrate, a buffer layer, an N-type semiconductor layer, a low-temperature stress release layer, a multi-quantum well light-emitting layer, an electron blocking layer and a P-type semiconductor layer. The multi-quantum well light-emitting layer comprises a first sub-layer, a second sub-layer, a third sub-layer and a fourth sub-layer which are stacked in sequence, and each of the first sub-layer, the second sub-layer, the third sub-layer and the fourth sub-layer comprises an InGaN quantum well layer and a GaN quantum barrier layer which are periodically and alternately stacked; an electron injection layer is inserted into at least one of the GaN quantum barrier layer of the first sub-layer, the GaN quantum barrier layer of the second sub-layer and the GaN quantum barrier layer of the third sub-layer; and a hole injection layer is inserted into the GaN quantum barrier layer of the fourth sub-layer. By implementing the invention, the electron hole matching degree of the multi-quantum well light-emitting layer can be improved, so that the luminous efficiency of the light-emitting diode is improved.
Owner:JIANGXI ZHAO CHI SEMICON CO LTD

Image classification method based on multi-quantum filtering convolutional neural network

The invention discloses an image classification method based on a multi-quantum filtering convolutional neural network, and the method comprises the steps: compressing a pixel value of an obtained image, and coding the compressed pixel value into a corresponding quantum state through a quantum revolving door; and inputting the quantum state into a quantum convolutional neural network to obtain an image label predicted value, training the quantum convolutional neural network by using the predicted value and a loss function to obtain a trained quantum convolutional neural network, the quantum convolutional neural network including a quantum convolutional layer, a quantum measurement attention layer, a pooling layer and a full connection layer, the quantum convolution layer comprises G quantum filters; and inputting an image needing to be detected into the trained quantum convolutional neural network to complete image classification. According to the method, the multi-topology quantum convolutional neural network is combined with a quantum bit measurement attention mechanism, so that the problem of great loss of entanglement information in a measurement stage is effectively solved, the method can better adapt to a quantum calculation environment, and the advantages of quantum calculation are exerted.
Owner:NANJING UNIV OF INFORMATION SCI & TECH

Gan-based blue-green LED epitaxial structure and preparation method therefor

A GaN-based blue-green LED epitaxial structure, relating to the field of semiconductor photoelectric devices. The GaN-based blue-green LED epitaxial structure comprises a substrate, and a buffer layer, a dislocation regulation layer, a U-GaN layer, an N-GaN layer, a multi-quantum-well layer, an electron blocking layer and a P-GaN layer which are sequentially stacked on the substrate, wherein the dislocation regulation layer is of a periodic structure with the number of periods ranging from 2 to 10, and each period comprises a GaN layer and an Si-doped GaN layer that are sequentially stacked. The crystal quality of the epitaxial structure can be improved, thereby improving the light-emitting efficiency and the antistatic performance of the blue-green LED based on the epitaxial structure.
Owner:FOSHAN NATIONSTAR SEMICONDUCTOR CO LTD

Quantum computing task translation supporting multiple quantum computing technologies

A quantum computing service provides a quantum algorithm development kit that enables a customer to define a quantum task, a quantum algorithm, or a quantum circuit using an intermediate representation. The quantum computing service is then configured to automatically translate the quantum task, quantum algorithm, or quantum circuit into a specific representation specific to a particular quantum computing technology selected by the customer to be used to execute the customer's quantum task, quantum algorithm, or quantum circuit.
Owner:AMAZON TECH INC

SPA single packet authentication method based on quantum cryptography

The invention belongs to the technical field of network communication, and particularly relates to an SPA single packet authentication method based on quantum cryptography, which comprises the following steps: a client and a server establish a shared quantum key pool, and the quantum key pool comprises a plurality of quantum key segments with different life cycles; the client selects one key segment in the quantum key pool, and generates a dynamic key according to the session ID and the random number seed; acquiring a data abstract according to the single packet data; generating an authentication label containing a quantum watermark according to the data abstract and the quantum random number; the client sends a data packet containing the single packet data, the authentication tag and the key fragment index to the server; the server obtains a local key fragment from a local quantum key pool according to the key fragment index, generates a local dynamic key in combination with the same session ID and the random number seed, and performs hash operation on single packet data to obtain a local authentication tag; and the server carries out authentication comparison on the local authentication tag and the received authentication tag.
Owner:CHINA NAT INST OF STANDARDIZATION

Low-working-current-density green light Micro-LED epitaxial structure and preparation method thereof

PendingCN121218748AElectron holeDevice material
The invention relates to the technical field of semiconductor devices, in particular to a low-working-current-density green light Micro-LED epitaxial structure and a preparation method thereof. The epitaxial structure comprises a substrate, a buffer layer, an N-type semiconductor layer, a low-temperature stress release layer, a multi-quantum well light-emitting layer and a P-type semiconductor layer. The electron blocking layer is not arranged on the multi-quantum-well light-emitting layer, the multi-quantum-well light-emitting layer comprises four sub-layers including a first light blue light multi-quantum-well layer, a second blue light multi-quantum-well layer, a third green light multi-quantum-well layer and a fourth light blue light multi-quantum-well layer, and the In component content in the third green light multi-quantum-well layer is larger than that in other layers. The third cyan light multi-quantum well layer is a main light-emitting unit and is not provided with an electron blocking layer, so that the blocking effect on hole injection can be eliminated, the hole injection efficiency of the P-type semiconductor layer is remarkably improved, and the matching degree of electron hole concentration in a multi-quantum well light-emitting layer region is improved.
Owner:JIANGXI ZHAO CHI SEMICON CO LTD

Deep ultraviolet light emitting diode with light scattering structure and preparation method thereof

The invention relates to a deep ultraviolet light-emitting diode with a light scattering structure and a preparation method of the deep ultraviolet light-emitting diode. The light-emitting diode comprises a substrate layer, a buffer layer and an N-type semiconductor transmission layer which are sequentially arranged along the epitaxial growth direction of a chip, wherein the shape of the N-type semiconductor transmission layer is divided into an upper part and a lower part, and the multi-quantum well active layer, the P-type semiconductor transmission layer and the P-GaN contact layer sequentially cover the surface of the upper part of the N-type semiconductor transmission layer; a horizontal light scattering structure layer and a vertical light scattering structure are respectively distributed in the upper part and the lower part of the N-type semiconductor transmission layer. According to the invention, the scattering effect of light in the N-type semiconductor transmission layer is improved, the optical waveguide effect of the N-type semiconductor transmission layer is broken, the light is effectively prevented from spreading to the metal n electrode, meanwhile, the light can be scattered, the bottom light emitting efficiency of the deep ultraviolet LED is improved, and the light extraction efficiency is improved.
Owner:HEBEI UNIV OF TECH

Multiband light emitting diode epitaxial structure and preparation method thereof

The invention relates to the technical field of semiconductor devices, in particular to a multiband light-emitting diode epitaxial structure and a preparation method thereof. The multiband light-emitting diode epitaxial structure sequentially comprises a substrate, a buffer layer, an N-type semiconductor layer, a low-temperature stress release layer, a multi-quantum well light-emitting layer, an electron blocking layer and a P-type semiconductor layer from bottom to top, the multi-quantum well light-emitting layer comprises four sub-layers, namely a first long-wave cyan light multi-quantum well layer, a second short-wave cyan light multi-quantum well layer, a third long-wave blue light multi-quantum well layer and a fourth short-wave blue light multi-quantum well layer which are sequentially stacked and grown from bottom to top, and the light-emitting wavelengths are sequentially decreased. Meanwhile, by combining the design of the sub-layers of the multiple quantum well light-emitting layers and through the synergistic effect of exciting light of all wave bands, the overall excitation efficiency can be improved, full-spectrum white light is output, the full-spectrum white light is closer to sunlight, the light-emitting efficiency is high, the color rendering property is good, the stability is better, and harm to human eyes is small.
Owner:JIANGXI ZHAO CHI SEMICON CO LTD

Quantum well, multi-quantum well epitaxial structure and preparation method thereof

The invention provides a quantum well, a multi-quantum well epitaxial structure and a preparation method thereof, and belongs to the field of semiconductor lasers. The invention provides a quantum well which is of a multi-layer structure and comprises alternate quantum barrier layers and quantum well layers. The array substrate further comprises a gradient buffer layer. The adjacent quantum barrier layer and quantum well layer are combined through a gradient buffer layer; the bottom layer and the top layer in the multi-layer structure are quantum barrier layers; in a unit formed by the connected quantum barrier layer, gradual change buffer layer and quantum well layer, with the quantum barrier layer as the beginning and the adjacent quantum well layer as the end, the size of the gradual change buffer layer in the horizontal direction is gradually reduced, the emission wavelength of the gradual change buffer layer is gradually increased in the direction from beginning to end, and the emission wavelength of the gradual change buffer layer is gradually increased. The initial emission wavelength of the gradient buffer layer is consistent with the emission wavelength of the quantum barrier, and the final emission wavelength of the gradient buffer layer is smaller than the emission wavelength of the quantum well. The quantum well has a high carrier migration rate, a high refractive index and a high optical confinement factor.
Owner:EPIHOUSE OPTOELECTRONICS CO LTD

Patterned photonic crystal laser and preparation method thereof

The invention provides a patterned photonic crystal laser and a preparation method thereof, the laser comprises a substrate, and a first mask layer, a photonic crystal layer and a second mask layer which are sequentially deposited on the substrate, a light emitting area is etched in the central area of the second mask layer, and transparent conductive layers are deposited on the surface of the second mask layer and the light emitting area; a p-annular electrode is arranged on the surface of the transparent conductive layer on the second mask layer, and an n-annular electrode is arranged below the substrate; the photonic crystal layer is composed of a nanorod array and a polymer filled in gaps of nanorods; holes distributed in a patterned array are etched in the surface of the first mask layer, and nanorods are epitaxially grown in hole areas; the nanorod is formed by sequentially depositing a substrate contact layer, a first waveguide layer, a multi-quantum well layer, a second waveguide layer, a coating layer and a component gradient layer. According to the invention, through collaborative design optimization of all the layers, emission of laser with specific wavelength and preparation of a laser emitting laser with single longitudinal mode, narrow linewidth and stable wavelength are realized.
Owner:WUHAN UNIV

GaN-based blue-green light LED epitaxial structure and preparation method thereof

The invention discloses a GaN-based blue-green light LED epitaxial structure and a preparation method thereof. The GaN-based blue-green light LED epitaxial structure comprises a substrate, and a buffer layer, a 3D layer, a U-GaN layer, an N-GaN layer, a multi-quantum well layer, an electron blocking layer and a P-GaN layer which are stacked on the substrate in sequence, the multi-quantum well layer comprises a shallow well transition layer, a high-temperature quantum well layer, a stress release layer and a low-temperature quantum well layer which are sequentially stacked, and the stress release layer comprises AlN layers and GaN layers which are periodically and alternately stacked. By implementing the invention, the luminous efficiency of the light-emitting diode under high current density can be effectively improved.
Owner:FOSHAN NATIONSTAR SEMICONDUCTOR CO LTD

Micro-LED epitaxial wafer and preparation method thereof

The invention discloses a Micro-LED epitaxial wafer and a preparation method thereof, a multi-quantum well light-emitting layer of the Micro-LED epitaxial wafer comprises a first sub-layer, a second sub-layer and a third sub-layer which are stacked in sequence, and each of the first sub-layer, the second sub-layer and the third sub-layer comprises a pre-well protection layer, an InGaN quantum well layer, a post-well protection layer and a quantum barrier layer which are periodically and alternately stacked; the In component proportion of the InGaN quantum well layer in the first sub-layer and the third sub-layer is smaller than the In component proportion of the InGaN quantum well layer in the second sub-layer; the well front protection layer comprises a first InGaN well front protection layer, an AlGaN well front protection layer and a second InGaN well front protection layer which are stacked in sequence, and the well rear protection layer comprises an InGaN well rear protection layer, an AlGaN well rear protection layer and a GaN well rear protection layer which are stacked in sequence. According to the invention, the light-emitting brightness of the Micro-LED can be improved.
Owner:JIANGXI ZHAO CHI SEMICON CO LTD

Red light Micro light emitting diode epitaxial wafer and preparation method thereof

The invention discloses a red light Micro light emitting diode epitaxial wafer and a preparation method thereof. The epitaxial wafer comprises a GaAs substrate, an N-type layer, a multi-quantum well active layer and a P-type layer which are sequentially arranged from bottom to top, the multi-quantum well active layer comprises a plurality of AlGaInP quantum well layers and quantum barrier layers which are alternately arranged, a hole injection layer is inserted between at least part of quantum well structures, and the hole injection layer is composed of a first N-type doped sub-layer, a P-type doped sub-layer and a second N-type doped sub-layer which are connected in sequence; the materials of the three sub-layers are (Al < x > Ga < 1-x >) < 0.5 > In < 0.5 > P (x is greater than or equal to 0.5 and less than or equal to 0.9), and the doping concentration is in gradient distribution along the thickness direction. By introducing the N-P-N structure hole injection layer, the hole injection efficiency is improved, electron leakage and Mg diffusion are inhibited, and the luminous efficiency of the red light Micro LED is remarkably improved.
Owner:FOCUS LIGHTINGS SCI & TECH

Quantum network data transmission method and system for multi-quantum-bit communication

The invention relates to a quantum network data transmission method and system for multi-quantum-bit communication, and belongs to the technical field of quantum communication and network. According to the method, an E2E entanglement generation mechanism and a specific noise interference mechanism of multi-quit communication in the quantum network are established, a multi-quit entanglement quality evaluation model, an E2E communication time delay model and a request data transmission model are modeled, and a centralized and distributed collaborative optimization network response model is designed. According to the system, a proposed multi-quit entanglement communication framework is trained and deployed on quantum network models of different scales, the system is used for processing transmission requirements of heterogeneous requests in batches, and stable and efficient data transmission service can be provided for concurrent response of batch requests in a large-scale quantum network. According to the invention, resource configuration and transmission quantification can be carried out on entanglement establishment and entanglement transmission, the response time delay of a large-scale quantum network to a multi-request transmission demand is reduced, and quantum resources are reasonably used.
Owner:BEIJING INST OF TECH

Light emitting diode epitaxial wafer and preparation method thereof

The invention discloses a light-emitting diode epitaxial wafer and a preparation method thereof, and relates to the technical field of semiconductors. The light-emitting diode epitaxial wafer comprises a substrate, and a buffer layer, a non-doped GaN layer, an N-type GaN layer, an electron dredging layer, a multi-quantum well layer, an electron blocking layer and a P-type GaN layer which are stacked on the substrate in sequence, the electron dredging layer comprises a first sub-layer, a second sub-layer, a third sub-layer and a fourth sub-layer which are sequentially stacked, the first sub-layer is a Si3N4 layer, the second sub-layer comprises an AlGaN layer, a first InGaN layer and a first GaN layer which are periodically and alternately stacked, the third sub-layer comprises a second GaN layer and a second InGaN layer which are periodically and alternately stacked, and the fourth sub-layer is a Si3N4 layer. And the fourth sub-layer comprises an AlInGaN layer, a third InGaN layer and a third GaN layer which are periodically and alternately stacked. According to the invention, while the electronic expansibility is improved, excessive electrons are prevented from entering the multi-quantum well layer to generate electron overflow.
Owner:JIANGXI ZHAO CHI SEMICON CO LTD

Optical transmitter

Provided is an optical transmitter having high manufacturing stability and a high reflection suppression effect. In the optical transmitter, a distributed feedback (DFB) laser having an active region formed as a multiple quantum well that generates an optical gain by current injection and a diffraction grating, an electro-absorption (EA) modulator having an absorption region formed as a multiple quantum well having a composition different from a composition of the DFB laser, a semiconductor amplifier (SOA) having an active region having a same composition as the composition of the DFB laser, a bent waveguide that rotates a light propagation direction by an angle θwg, and a passive waveguide connected to the SOA and including a core having a band gap wavelength shorter than an oscillation wavelength of the DFB laser are monolithically integrated on one substrate. The passive waveguide has a tapered region and a narrow waveguide region. The tapered region converts a width W1 of the passive waveguide connected to the SOA into a width W2 of the narrow waveguide region, and the passive waveguide forms the angle θwg with respect to a normal line to an end surface of the substrate and is in contact with the end surface of the substrate.
Owner:NT T INC

Chip structure capable of simultaneously improving deep ultraviolet LED crystal quality and injection efficiency and preparation method

The invention discloses a chip structure capable of simultaneously improving deep ultraviolet LED crystal quality and injection efficiency and a preparation method. The chip structure comprises a substrate, a buffer layer is arranged on the substrate, a multi-quantum well layer is arranged above the buffer layer, an n-type doping layer is arranged on the side face of the multi-quantum well layer, and an n-type contact electrode is arranged above the n-type doping layer. A plurality of p-type doped layer plugs are inserted in the multi-quantum well layer, a p-type doped layer is arranged above the p-type doped layer plugs and the multi-quantum well layer, and a p-type contact electrode is arranged on the p-type doped layer; a passivation layer is arranged on the upper surface of the whole structure, and the thickened metal electrode penetrates through the passivation layer and is located on the n-type contact electrode and the p-type contact electrode. According to the invention, insufficient hole injection in the multi-quantum well layer and the crystal quality of the multi-quantum well layer can be improved at the same time.
Owner:TIANJIN POLYTECHNIC UNIV

Quantum computer operation method, equipment, system and device based on batch processing

The embodiment of the invention provides a quantum computer operation method, equipment, system and device based on batch processing, and relates to the technical field of quantum.The method comprises the steps that a plurality of target quantum circuits to be operated currently are obtained; compiling the plurality of target quantum circuits in a first parallel mode to obtain quantum calculation instructions corresponding to the plurality of target quantum circuits, and taking the quantum calculation instructions as target quantum calculation instructions; and the obtained multiple target quantum calculation instructions are sent to a quantum chip, correspondingly, the quantum chip can execute the multiple target quantum calculation instructions, and operation results of the multiple target quantum circuits are obtained. Thus, in the process of using a large number of quantum circuits for calculation, the multiple quantum circuits can be compiled at the same time in a parallel mode, the time consumed for compiling the quantum circuits is shortened, and then the overall calculation efficiency can be improved.
Owner:ORIGIN QUANTUM COMPUTING TECH (HEFEI) CO LTD

Calculation module, wafer level processor and wafer level computer

The invention provides a calculation module, a wafer level processor and a wafer level computer, the calculation module comprises a plurality of calculation nodes arranged in a preset arrangement mode, and each calculation node comprises a control unit and a plurality of quantum calculation units. The control unit is electrically connected with each quantum computing unit, the control unit is used for deploying computing tasks of each quantum computing unit, and the quantum computing units carry out quantum computing and information storage. The wafer-level processor comprises a plurality of calculation modules, and the wafer-level processor is arranged in a dilution refrigerator to form the wafer-level computer. According to the calculation module, the wafer-level processor and the wafer-level computer provided by the embodiment of the invention, the integration density is improved through a wafer-level integration technology, so that the calculation power of a system is improved.
Owner:SEMICON TECH INNOVATION CENT(BEIJING) CORP +1

P-type GaN LED epitaxial structure based on segmented annealing and compensation doping and preparation method thereof

The invention relates to a P-type GaN LED epitaxial structure based on segmented annealing and compensation doping and a preparation method thereof, and belongs to the technical field of nitride semiconductor epitaxial growth and doping activation. The epitaxial structure sequentially comprises a buffer layer, a non-doped GaN layer, an N-type GaN layer, a multi-quantum well active layer, a P-type AlGaN electron barrier layer, a P-type GaN layer and an MgN compensation layer which are arranged on the substrate layer; wherein the MgN compensation layer is a high-concentration magnesium-doped nitride semiconductor layer, is arranged on the P-type GaN layer, and is used for compensating Mg loss and inhibiting nitrogen vacancy formation in the subsequent annealing process. The preparation method comprises the steps of performing multi-stage annealing treatment on the P-type GaN layer, performing epitaxial growth and annealing on the compensation layer, and finally performing low-temperature post-treatment annealing to form a surface passivation region. According to the structure, the Mg activation efficiency and the hole concentration are remarkably improved through an in-vivo activation and surface compensation synergistic mechanism, the contact resistance is reduced, the conductivity and the light-emitting performance of an LED device are improved, and the structure has excellent implementability and industrialization prospects.
Owner:JUCAN PHOTOELECTRIC TECH (SUQIAN) CO LTD

Gallium nitride-based light emitting diode epitaxial structure and preparation method thereof, and LED chip

The invention provides a gallium nitride-based light emitting diode epitaxial structure, a preparation method thereof and an LED chip. In the epitaxial structure, a multi-stage electron-phonon scattering structure is designed for the situations of electron acceleration and hot electron transition caused by electron ballistic transport and a quantum stark effect structure in a quantum well, the forbidden band width of a quantum well layer in a multi-quantum well barrier layer is gradually increased, and an InGaN step structure is used for inhibiting electron leakage under different situations, so that the quantum efficiency is improved. And the external quantum efficiency under large current is effectively improved.
Owner:LATTICE POWER (JIANGXI) CORP

GaN-based LED epitaxial structure and preparation method thereof, and LED chip

According to the GaN-based LED epitaxial structure, the preparation method thereof and the LED chip provided by the invention, electron leakage is reduced through the electron blocking layer, and meanwhile, the hole injection layer comprising the thin AlN layer is adopted between the multi-quantum well layer and the electron blocking layer in the epitaxial structure, so that the barrier barrier height during hole transport can be reduced, and the hole transport efficiency can be improved. In addition, an effective path for hole tunneling is provided, energy during hole injection is increased, hole injection efficiency is remarkably improved, the concentration of holes injected into the multi-quantum well layer is increased, and then the luminous efficiency of the LED is improved.
Owner:LATTICE POWER (JIANGXI) CORP

Multiband LED epitaxial structure and preparation method thereof

ActiveCN120897586AMaterials scienceRetina cell
The invention discloses a multiband LED epitaxial structure and a preparation method thereof, and relates to the technical field of semiconductors. A multi-quantum well light-emitting layer of the multiband LED epitaxial structure comprises a first long-wave blue light multi-quantum well light-emitting layer, a second medium-wave blue light multi-quantum well light-emitting layer, a third short-wave blue light multi-quantum well light-emitting layer and a fourth short-wave blue light end quantum well light-emitting layer which are sequentially stacked. The LED chip manufactured through the epitaxial structure can emit light of three different wave bands including long-wave blue light, medium-wave blue light and short-wave blue light, the excitation light source with the blue light of the three wave bands excites the red-green mixed fluorescent powder layer, a full-spectrum white light LED light source can be generated, and compared with a blue light LED chip with only one wave band, the full-spectrum white light LED light source has the advantages that the light emitting efficiency is improved, and the light emitting efficiency is improved. The ratio of short-wave blue light below 450 nm is small, damage to human eye retina cells is small, and a healthy full-spectrum white light LED light source with a high color rendering index can be achieved.
Owner:JIANGXI ZHAO CHI SEMICON CO LTD

GaN-based LED epitaxial wafer and preparation method thereof

PendingCN120302771APhysical chemistryGraphite
The invention provides a GaN-based LED epitaxial wafer and a preparation method thereof, and the method comprises the following steps: S1, providing a substrate, and placing the substrate on a graphite disc of an MOCVD reaction chamber; s2, carrying out heat treatment on the substrate; s3, growing a buffer layer on the substrate after heat treatment; s4, sequentially growing an unintentional doping layer and an N-type GaN layer on the buffer layer; s5, growing a multi-quantum well light-emitting layer on the N-type GaN layer; s6, growing a P-type electron blocking layer on the multi-quantum well light-emitting layer; step S7, growing a P-type GaN layer on the P-type electron barrier layer; and S8, after growing the P-type GaN layer, adjusting the temperature of the reaction chamber to 20-30 DEG C to obtain the GaN-based LED epitaxial wafer. The GaN-based LED epitaxial wafer obtained by the method has fewer surface particles and higher surface quality.
Owner:BEIJING ZHONGBOXIN SEMICON TECH CO LTD

Intermediate infrared high-speed waveguide type modulator capable of being integrated on chip and design method

The invention provides a mid-infrared high-speed waveguide type modulator capable of being integrated on a chip and a design method, and belongs to the technical field of semiconductor optoelectronic devices, aiming at solving the problem that an existing mid-infrared modulator cannot consider high speed, low loss and on-chip integration compatibility at the same time. The modulator comprises an InP substrate, an epitaxial structure growing on the InP substrate and a traveling wave electrode structure prepared on the epitaxial structure. The epitaxial structure sequentially comprises an InP contact layer, an InAlAs lower light limiting layer, an InP / InGaAs lower waveguide layer, an asymmetric multi-quantum well structure, an InP / InGaAs upper waveguide layer, an InAlAs upper light limiting layer and a Cap layer from bottom to top. The design method comprises the steps of selecting a compatible material system, designing an asymmetric multi-quantum well structure, processing an epitaxial structure into a ridge waveguide structure, designing a traveling wave electrode and carrying out device characterization testing. The method is suitable for design and preparation of the middle-infrared band high-speed light modulation device.
Owner:CHANGCHUN UNIV OF SCI & TECH

Light emitting diode epitaxial structure and preparation method thereof

The invention relates to the technical field of semiconductor devices, in particular to a light-emitting diode epitaxial structure and a preparation method thereof. The light-emitting diode epitaxial structure comprises a substrate, an h-BN / O2 layer, a low-temperature GaN buffer layer, an N-type semiconductor layer, a multi-quantum well layer and a P-type semiconductor layer which are arranged in sequence, the h-BN / O2 layer subjected to oxygen plasma treatment is inserted between the heterogeneous substrate and the GaN epitaxial layer, the low-temperature GaN buffer layer is grown on the h-BN / O2 layer by controlling the process conditions, and the h-BN / O2 layer and the low-temperature GaN buffer layer are matched, so that lattice mismatch dislocation, residual stress and thermal mismatch of an epitaxial material grown on the heterogeneous substrate can be effectively modulated, the scattering efficiency under high current is improved, and the light emitting efficiency is improved. The probability of radiation recombination of the heteroepitaxial material is improved, and the requirement for heteroepitaxy is lowered.
Owner:JIANGXI ZHAO CHI SEMICON CO LTD

Hybrid quantum-classical computing system for processing artificial intelligence applications

A hybrid quantum-classical computing system designed to enhance AI applications by integrating classical computational methods with quantum computing power. The system incorporates a classical computing unit and multiple quantum computing units, each specialized for distinct algorithmic tasks. A control module within the classical unit, using predetermined decision logic, manages the distribution of tasks, selectively engaging quantum units for their unique capabilities to optimize efficiency. This scalable architecture allows for significant advances in AI, tackling complex, resource-intensive tasks by effectively harnessing the strengths of both quantum superposition and classical processing.
Owner:BF EXAQC AG

Light-emitting diode epitaxial wafer and preparation method thereof

The present invention provides a light-emitting diode epitaxial wafer and a method for fabricating the same. The light-emitting diode epitaxial wafer comprises a substrate, and a buffer layer, a three-dimensional nucleation layer, an undoped GaN layer, an N-type GaN layer, a multi-quantum well layer, an electron blocking layer, and a P-type GaN layer sequentially deposited on the substrate. The three-dimensional nucleation layer comprises a stacked first and second three-dimensional nucleation sublayers, the thickness of the first three-dimensional nucleation sublayer being less than that of the second three-dimensional nucleation sublayer, both being MgGaN layers, and the growth temperature of the second three-dimensional nucleation sublayer being 10 to 100°C higher than that of the first three-dimensional nucleation sublayer. This light-emitting diode epitaxial wafer can increase the density of V-pits, improve carrier injection efficiency, and enhance the optoelectronic performance of the light-emitting diode.
Owner:JIANGXI ZHAO CHI SEMICON CO LTD